Printer Friendly

Vinyl overlays standard.

VINYL OVERLAYS STANDARD

VOLUNTARY STANDARD FOR

VINYL DECORATIVE

OVERLAYS

1. Purpose Polyvinyl chloride films, referred to as PVC films, are commonly used as decorative laminates in combination with several types of substrates. The purpose of this standard is to outline various attributes of PVC films which are controllable, and set performance criteria or tolerance levels for these categories.

2. Scope This standard covers the range of generally accepted types of PVC decorative laminates. The specification will cover construction, thicknesses, sizes, surface treatments, physical property measurements, and other characteristics.

All of the tests and criteria presented in this standard relate to the use of vinyl films on wood substrates. The substrates commonly used are particleboard, medium density fiberboard, hardboard, lauan, and hardwood plywood.

3. Requirements 3.10 General Products represented as complying with this voluntary standard shall meet all of the applicable requirements as set forth in this section.

Test substrate will be 45-47 pound density industrial quality particleboard. Adhesive will be epoxy.

3.15 Type of Vinyl Polyvinyl chloride films consist of four basic categories:

3.15.1 Two Mill Reverse Printed Rigid Film Clear rigid PVC. The design is printed on the back of the film with the .0018 in. (plus or minus 10%) vinyl protecting the print.

3.15.2 Semirigid Film Semirigid or rigid PVC. The design is printed on the back of the film in reverse order. Embossing and top coatings are available options depending on the end use application. Gauge ranges from 4 to 24 mils.

3.15.3 Sandwich Film Semirigid or rigid PVC two-ply laminate. The opaque base film is top printed and a clear overlay is laminated on top. The film is designed for mitrefold applications and is available with embossings and top coatings as required by the end use application. Gauge ranges from 5 to 24 mils.

3.15.4 Solid Color Film Semirigid or rigid PVC that is custom color matched in a variety of hues. The film is integrally colored and can be top printed, top coated, or embossed. Gauge ranges from 3 to 12 mils.

3.20 Construction 3.20.1 Formulation of PVC The formulation of PVC film is left to the discretion of the manufacturer. As these specific formulations are proprietary in nature, there is no requirement for them to be disclosed.

3.25 Color When manufactured in a solid color, PVC decorative films shall be of consistent color throughout the rolls supplied to customers. While some slight color variations are permissible, the color shall be a commercial match to the standard retained by the manufacturer or samples provided to the customer.

3.30 Color Matching PVC decorative film is generally manufactured to match some specific color or print pattern. These colors and patterns are often high pressure laminates, printed papers, painted boards, or other printed vinyls. Manufacturers generally name or number their patterns with their own names or numbers, which do not necessarily relate to the aforementioned patterns.

Manufacturers are free to name and number their patterns as desired, within the copyright laws of the United States and Canada.

A reasonable match shall be one that would be considered a good commercial match.

All colors and print patterns must be checked by customers prior to use to insure the match is appropriate. All colors must be checked under a preagreed upon light source.

The sample must also be viewed under the same conditions; (i.e., vertical or horizontal positioning, etc.). As all printed surfaces vary in gloss and color, there will be some variation in production quantities.

3.35 Custom Matching If a customer submits a specific color and opacity to be matched, the customer and the manufacturer will agree on what is to be matched; i.e., laminate sample, paint chip, etc. The manufacturer will provide a sample of the color match in the form of a hand sample to the customer for approval. Once approved by the customer, the material must be produced as a commercial match of the sample provided to the customer.

Customers and manufacturers alike must realize that PVC decorative films can be used on substrates other than the one from which the original match was made. Two film samples, even of the same color and opacity, may appear to be different on different substrates, or under different lighting conditions.

3.40 Gloss The gloss of the PVC decorative films shall be consistent across the street, as well as from roll to roll.

While some slight variations are permissible, the gloss shall be a commercial match to the standard retained by the manufacturer or samples provided by the customer.

3.45 Product Thickness Total product thickness will be designated by the manufacturer.

Companies may manufacture film in any thickness they desire, and various thicknesses may be required for various applications.

The following tolerances are generally accepted throughout the industry: 0-12 mil, [+ or -] 10%; 12-20 mil, [+ or -] 7.5%; 20 mil & above, [+ or -] 5%.

3.50 Product Width The width of individual master rolls shall be specified, in fractions of an inch, in increments of no less than 1/4 in. The tolerance in width shall be minus 0, plus 1/4 in.

The width of individual slit rolls shall be specified in fractions of an inch, in increments of no less than 1/6 in.

3.55 Splices Continuous rolls of PVC decorative films may contain splices. Splices in the roll are to be clearly marked so as to alert the customer. If splices are present, they will be tight and well laminated. The splices will not separate when rolled from the core. The length between the joints may vary from roll to roll, and within the roll. The number of splices allowed per roll will be specified by the manufacturer.

3.60 Shrinkage Vinyl films are thermoplastic and will be subject to shrinkage at elevated temperatures. Maximum shrinkage shall be specified as less than or equal to -10% in length, and less than or equal to +5% across machine direction when tested at 100 [degrees] C for 10 minutes.

4. Physical Properties PVC films share many physical characteristics which provide benefits to the end user. The following categories represent commonly used criteria to measure these physical properties.

Typical property values are average of test lots. These numbers are not considered specifications as variation in formulations, gauges and film construction will effect these values. Comparisons between products should take these factors into consideration.

4.10 Wear Resistance Testing for wear resistance will be in accordance with the National Electrical Manufacturers Association (hereinafter referred to as NEMA) spec LD-3-3.01 using a standard CS-10 abrasive wheel and 500 gram load. Measurements will include Rate of Wear in milligrams expressed as loss per 100 cycles and minimum number of cycles to failure in both initial failure and final failure.

.002 in. rigid film is tested at 1,000 cycles, with a 1,000 gram load, using a CS-17 abrasive wheel.

Typical property values for the four categories of vinyl are shown in Chart 1 on previous page.

[Tabular Data Omitted]

4.15 Boiling Water Resistance Testing for boiling water resistance will be in accordance with NEMA LD#3.05. This test measures the effects of placing a pan of boiling water on the surface for 10 minutes.

The effect of boiling water shall be reported as:

* No effect - no change in color or surface texture.

* Slight effect - a change in color or surface texture which is difficult to perceive.

* Moderate effect - a change in color or surface texture which is easily perceived, but does not appreciably alter the original condition of the specimen.

Typical property values for the four categories of vinyl are as follows:

a. .0018 in. reverse print rigid, to be determined

b. Woodgrain/decorative reverse print, no effect;

Woodgrain/decorative reverse print coated, no effect

c. Woodgrain/decorative sandwich film, no effect;

Woodgrain/decorative sandwich film coated, no effect

d. Solid color film, no effect;

Solid color film coated, no effect

4.20 Stain Resistance Testing for stain resistance will be in accordance with NEMA LD3-3.09. This test measures the surface resistance to stain by common household agents. The stain is applied to the surface and covered with a glass cover for 24 hours.

The effect of staining materials shall be reported as:

"O" No effect - stains removed with no impairment to the finish.

"M" Moderate effect - stains which require the use of an abrasive for removal, resulting in a decrease in gloss.

"X" Severe effect - stains which cause a permanent color change or irreparable surface damage. A severe effect may be expected from certain harsh chemicals if they are allowed to contact the decorative surface.

Typical performance properties are indicated in Chart II.

[Tabular Data Omitted]

4.25 Hoffman Scratch Resistance Testing vinyl for scratch resistance will be done with a Gardner Modified Hoffman Scratch Tester. The test will be performed by laminating vinyl film to a rigid backer of particleboard or MDF. The tester consists of a carbide tip, which is attached to a weighted balance beam to exert a specific amount of pressure, measured in grams, to the surface.

The test is performed by placing the instrument on the substrate and exerting downward pressure of 200 grams.

The tester is drawn over the substrate at a rate of 2 inches per minute. After scratching, the area is examined for loss of coating. The value is recorded in grams at the point the surface is distorted.

It should be noted that deep textured embossing may affect the outcome of this test. Microscopic examination should be conducted to determine if marking is due to destruction of vinyl or actual coating loss.

Typical performance properties are indicated as follows:

a. .0018 in. reverse print rigid, to be determined

b. Woodgrain/decorative reverse print, 400;

Woodgrain/decorative reverse print coated, 1,600

c. Woodgrain/decorative sandwich film, 400

Woodgrain/decorative sandwich film coated, 1,800

d. Solid color film, 400

Solid color film coated, 1,000

4.30 Tape Resistance Testing is done to measure the adhesion of the top coating to the vinyl surface. A cross hatch pattern consisting of a grid of 10 lines is cut into the vinyl with a scalpel. Scotch brand #600 high tack tape is applid over the cross hatch pattern and smoothed over the surface with firm pressure.

The tape is then pulled from the cross hatch and examined for the presence of coating. The cross hatch is then measured under the microscope. The degree of loss is expressed on a percentage basis. 100% represents no loss of coating.

Typical performance properties are indicated as follows:

b. Woodgrain/decorative reverse print coated, 100%

c. Woodgrain/decorative sandwich film coated, 100%

d. Solid color film coated, 100%

4.35 Cleanability of Surface Testing the cleanability of the surface will be in accordance with NEMA LD3-3.12. This test measures the cleanability of the surface with common agents. The test results compare the cleaned test area with the masked original surface and reports the effect as follows:

* No effect - 0-10 scrubbing strokes; clean as original; no change in appearance.

* Slight effect - 11-25 strokes; clean as original; no change in appearance.

* Moderate effect - 26-50 strokes; clean as original; slight change in appearance.

* Severe effect - more than 50 strokes; not clean or obvious change in appearance, or both.

Typical property values for the four categories of vinyl are as follows:

a. .0018 in. reverse print rigid, effect and strokes to be determined

b. Woodgrain/decorative reverse print, moderate effect, 35 strokes

Woodgrain/decorative reverse print coated, slight effect, 25 strokes

c. Woodgrain/decorative sandwich film, moderate effect, 35 strokes

Woodgrain/decorative sandwich film coated, slight effect, 25 strokes

d. Solid color film, moderate effect, 35 strokes

Solid color film coated, slight effect, 25 strokes

4.40 Burnish Resistance Testing is designed to stimulate marking when something is dragged across the vinyl surface. The test is performed using a glazed ceramic pestle, which is placed on the laminated substrate and moved in a circular motion.

The burnish left by the pestle is rated on a scale of 0 to 10, with 0 denoting severe burnish and 10 indicating no burnish marking.

Typical performance properties are indicated in chart on right.
 Table : Removal
 Burnish W/Alcohol
 Resistance


.0018 [inches] reverse print rigid TBD* TBD*

Woodgrain/ decorative 5 No reverse print

Woodgrain/ decorative reverse print 8 Yes coated

Woodgrain/ decorative 5 No sandwich film

Woodgrain/ decorative sandwich film 8 Yes coated

Solid color 5 No film

Solid color 8 Yes film coated

[*] To Be Determined 4.45 Surface Burning Surface burning is tested in accordance to the American Society for Testing and Materials E-84 specifications (hereinafter referred to as ASTM). Flame spread value and smoke density are reported. Class ratings are assigned based on values of flame spread, surface burning, and smoke density values. The vinyl is fixed to a reinforced cement board with a flame contribution of zero.

Typical properties for vinyls are rated as shown in Chart III on page 84.

[Tabular Data Omitted]

5. Failure to Conform Any decorative PVC film reported to be in compliance and found not to be, may be replaced to the customer, or at the discretion of the manufacturer, the purchase price of the substandard material may be refunded.

In no case will the manufacturer be responsible for any liability in excess of the cost of the replacement material.

PHOTO : The LMA's voluntary standard for polyvinyl chloride overlays consists of four basic categories: 2 mil reverse printed rigid film, semirigid film, sandwich film and solid color film.
COPYRIGHT 1991 Vance Publishing Corp.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 1991, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:introduced by the Laminating Materials Association
Publication:Wood & Wood Products
Date:Jun 1, 1991
Words:2266
Previous Article:A glossary of terms for materials used in decorative laminating.
Next Article:Voluntary standard for low basis weight paper decorative overlays.
Topics:


Related Articles
LMA provides first-class service to the decorative overlays industry.
Decorative overlays triple in consumption.
Great cover-ups: laminates and solid surfacing.
LMA expands services to the decorative laminating industry.
A glossary of terms for materials used in decorative laminating.
LMA product finder.
LMA publishes statistical report on overlays.
Voluntary standards for PVC thermoforming vinyl.
Laminates Offer Limitless Designs.
No Limits to Laminates: Fabricators Tell Their Success Stories.

Terms of use | Copyright © 2017 Farlex, Inc. | Feedback | For webmasters